Make a copy of this sheet for each student and have it taped to their back. Each student has a pencil, and when the teacher says "Go", students circulate around the room and write the definitions of the verbs on another student's back. Limit 2 conjugations per transaction before moving on to another student. After someone has theirs completely filled in, or after a predetermined time, have students remove their sheet and make any necessary corrections and bring the sheet to the teacher. First 5 students to bring a completed sheet with 100% accuracy win. You could also do this just as a fun activity to get students out of their seat, but not make it a game.